Compressor construction



April 6, 1965 s. MAIER 3,176,917

COMPRESSOR CONSTRUCTION Filed Nov. 15, 1961 2 Sheets-Sheet 1 HQ. E H6. 5

INVEN TOR.

SIEGFRIED MAIER A TTORNE Y5.

United States Patent 6 Claims. cl. ass-21s The present invention relates to a construction of the compressor housing of gas turbine drive units with a drive for auxiliary aggregates or units derived from the cornpressor drive shaft behind the last compressor stage through which the air passes radially, preferably in the form of a meshing spur gear drive.

The complete housing of a drive unit, in which the individual drive unit part; are intailed or into which the same are built in and at which auxiliary aggregates are arranged on the outside thereof, are usually composed in the prior art construction of several individual housings, housing parts and covers. The construction of the drive unit housing which necessarily is complicated as a result thereof entails an expensive manufacture and a time-consuming assembly.

The present invention is concerned with the problem of simplifying the drive unit housing by an appropriate construction of the compressor housing with respect tothe individual parts thereof and with respect to a compact, spacesaving arrangement of the provided auxiliary aggregates and drive thereof.

The problem is solved in accordance with the present invention by providing a compressor housing which consists, in the main, of two housing halves subdivided at the height of the compressor difiusor perpendicularly to the drive unit longitudinal axis and detachably connected with each other, and more particularly of a forward housing half which serves especially for the arrangement of the auxiliary aggregates and for the bearing of the forward drive connection or transmission for the auxiliary aggregates and of a rear housing half which especially serves for the support of the drive connection or transmission on the side of the shaft for the drive of the auxiliary aggregates and for the intallation of the center and rear bearin g of the compressor drive shaft.

Accordingly, it is an object of the present invention to provide a compressor housing, particularly for use with gas turbine drive units, which is simple in construction, inexpensive in manufacture and easy to assemble.

A further object of the present invention resides in the provision of a compressor housing arrangement in gas turbine drive units which results in a compact, space-saving overall arrangement inclusive the auxiliary aggregates and drive connection therefor.

Still a further object of the present invention resides in the provision of a compressor housing arrangement in gas turbine drive units in which the housing is subdivided within the area of the compressor diffuser in such a ruannet as to enable the ready accommodation of shafts, connecting lines, and the like without impairing the eiiiciency of the compressor.

Still a further object of the present invention resides in i the provision of a compressor housing construction, especially for gas turbine drive units which permits of a functional and appropriate arrangement and drive of the auxiliary aggregates normally used in such drive units.

These and other objects, features and advantages of the present invention will become more obvious from the fol- FIGURE 1 is a partial front elevational view of a gas turbine drive unit in accordance with the present invention;

FIGURE 2 is a cross sectional view taken along lI-II of FIGURE 1, and 7 FIGURE 3 is a cross sectional view taken along IIIHI of FIGURE 1.

Referring now to the drawing wherein like reference numerals are used throughout the various views to designate corresponding parts, the compressor housing in accordance with the present invention essentially consists, in the main, as may be seen in particular from FIGURE 2, of a front housing part generally designated by reference characters VG and of a rear housing part generally designated by reference characters 126 which are subdivided at the height of the compressor diffuser l1 perpendicularly to the drive unit longitudinal axis. The dilfusor 11 adjoining the last compressor stage 12 through which the compressed air flows radially is delimited, on the one hand, by a radially directed end face 13 of the forward housing part vG and, on the other, by a radially directed end face 14 of the rear housing part hG and is formed by relatively. thick-walled guide blades or guide vanes 15 arranged between the end faces 13 and 14.

The rear housing part 116 serves in particular for the installation and bearing support of the drive connection gener-ally designated by reference character H disposed on the side of the compressor transmission shaft, for the auxiliary aggregates and for the arrangement of the center bearing 16, and with the axially directed extension hG; thereof for the installation of the rear bearing 17 of the compressor drive shaft 18. The forward end of a radiantheat protective wall 19 is detachably secured radially outwardly at the rear housing half kG. The protective wall 19 follows the shape of the rear housing part M3, at first extends radially inwardly and thereupon extends in the axial direction rearwardly, surrounding the tubular-lyshaped housing extensions hG whereby the rear end 19' thereof is supported movably on a flange thereof in order to enable accommodation of heat expansions.

The rear housing half 12G is constructed as a gear box 29 provided with a rear cover wall 20" within the area of the drive connection H of the auxiliary aggregate drive on the side of the shaft which rear cover wall 26" is provided with an aperture 26' that is adapted to be closed by a detachable cover 21. The aperture 26 serves for purposes of assembly of the gear wheels of the drive connection H on the side of the shaft for the drive of the auxiliary aggregates.

The forward housing half vG is provided at the front side thereof with a pot-like, reniform projection 22 for the installation and support of the forward drive connection H of the drive for the auxiliary aggregates, which projection 22 is closed by a single detachable cover 23 on which the auxiliary aggregates such as the generator 24, the rotational speed measuring device 25, the fuel regulator 26 and the lubricating pump 27 are pare-assembled.

The forward end of the air collecting housing 28 is detachably secured, preferably by means of a reinforced flange 28' radially outwardly at the forward housing half vG which air collecting housing 28, extending perpendicularly to the plane of the drawing, leads into the combustion chamber 2d arranged perpendicularly to the drive unit longitudinal axis. a

The connecting shaft 39 between the drive connections H and H extends through the wedge-shaped guide blades or vanes 15. Additionally, the connecting lines 31 between the lubricating pump 27 and the pressure oil bores 32 extending within the rear housing half 116 as well as the lubricating oil suction bores 32' extend through these guide vanes 15. Furthermore, the securing screws 33-for'connecting the two compressor housing halves v6 and hG are so provided that they extend through the guide vanes 15 arrest-7 so that the free or unobstructed flow-passages of the compressor diffusor 11 are not imp-aired by any parts projecting therethrough.

The turbine inlet is designated by reference numeral 34 (FIGURE 2) and theturbine wheels are designated by reference numeral 35. 7

While I have shown and described one embodiment in accordance with the presentinvention, it is obvious that the same is not limited thereto, but is susceptible of many changes and modifications within the spirit and scope thereof, and I therefore do not wish to be limited to the details shown and described herein, but intend to cover all such changes and modifications as are encompassed by the scope of the appended claims.

I claim:

1. A compressor housing construction especially for gas turbine drive units having a drive for auxiliary aggregates derived from, the compressor drive shaft to the rear of the last compressor stage through which the air fiowsradially andwhich is adjoined by the compressordiffuser, said housing construction comprising a front housing half and a rear housing half, detachable securing means connecting said front housing half to said rear housing half, said housing halves being subdivided approximately at the height of the compressor-diffuser substantially perpendicular to the axis of thedrive unit, said front housing half serving for the support of said auxiliary aggregates, drive means for said auxiliary aggregates comprising a spur gear train drivably connecting said compressor drive shaft with said auxiliary aggregates, said spur gear train including forwardly disposed spur gear means disposed within said front housing half and rearwardly disposed spur gear means disposed within said rear housing half, said rearwardly disposed spur gear means being disposed rearwardly of said last compressor stage, shaft means drivably connecting said forwardly disposed spur gear means with said rearwardly disposed spur gear means, a. center bearing and a rear bearing for said compressor drive shaft supported by said rear housing half, said front housing half and said rear housing half having mutually confronting end faces, wedge-shaped guide vanes disposed between said end faces, said aggregates including oil pump means having supply and discharge hues, said lines, said detachable securing means, and sald shaft means extending through said guide vanes.

'2, A compressor housing construction according to housing surrounding said compressor drive shaft and sup porting said rear bearing.

3. A compressor housing according to claim 1, wherein said rear housing half constitutes a gear box for the reception of said rearwardly disposed spur gear means, said gear box comprising a rear cover Wall provided with an aperture adjacent said shaft means for'assembly of said rearwardly disposed spur gear means, and a removable cover for closing said aperture.

4. A compressor housing construction according to claim '1, wherein said rear housing half is provided with reinforcing ribs, said supply and discharge lines being disposed in said reinforcing ribs.

5. A compressor housing construction according to claim 2, wherein a protective wall member is detachably mounted on said rear housing half and extends radially in a position such as to shield said compressor-diffuser against radiant heat, said wall member having a portion conforming to the shape of the rearwardly facing portion of said rear housing half, said wail member having a further portion extending axially rearwardly and surrounding said tubular housing, and means compensating for eat expansion adjustably securing said further portion to said tubular housing.

6. A compressor housing construction according to claim 1, wherein said front housing half is provided at the front side thereof with supporting means including pot-like reniform projection means for the supportof said forwardly disposed spur gear means and of a plurality of said aggregates, said supporting means further comprising a single detachable cover on said projection means.

ReEerences Cited in the file of this patent UNiTED STATES PATENTS Sweden Mar. 29, 1960 

1. A COMPRESSOR HOUSING CONSTRUCTION ESPECIALLY FOR GAS TURBINE DRIVE UNITS HAVING A DRIVE FOR AUXILIARY AGGREGATES DERIVED FROM THE COMPRESSOR DRIVE SHAFT TO THE REAR OF THE LAST COMPRESSSOR STAGE THROUGH WHICH THE AIR FLOWS RADIALLY AND WHICH IS ADJOINED BY THE COMPRESSORDIFFUSER, SAID HOUSING CONSTRUCTION COMPRISING A FRONT HOUSING HALF AND A REAR HOUSING HALF, DETACHABLE SECURING MEANS CONNECTING SAID FRONT HOUSING HALF TO SAID REAR HOUSING HALF, SAID HOUSING HALVES BEING SUBDIVIDED APPROXIMAELY AT THE HEIGHT OF THE COMPRESSOR-DIFFUSER SUBSTANTIALLY PERPENDICULAR TO THE AXIS OF THE DRIVE UNIT, SAID FRONT HOUSING HALF SERVING FOR THE SUPPORT OF SAID AUXILIARY AGGREGATES, DRIVE MEANS FOR SAID AUXILIARY AGGREGATES COMPRISING A SPUR GEAR TRAIN DRIVABLY CONNECTING SAID COMPRESSOR DRIVE SHAFT WITH SAID AUXILIARY AGGREGATES, SAID SPUR GEAR TRAIN INCLUDING FORWARDLY DISPOSED SPUR GEAR MEANS DISPOSED WITHIN SAID FRONT HOUSING HALF AND REARWARDLY DISPOSED SPUR GEAR MEANS DISPOSED WITHIN SAID REAR HOUSING HALF, SAID REARWARDLY DISPOSED SPUR GEAR MEANS BEING DISPOSED REARWARDLY OF SAID LAST COMPRESSOR STAGE, SHAFT MEANS DRIVABLY CONNECTING SAID FORWARDLY DIS- 